CN208729829U - A kind of machinery rotary joint - Google Patents
A kind of machinery rotary joint Download PDFInfo
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- CN208729829U CN208729829U CN201821364554.XU CN201821364554U CN208729829U CN 208729829 U CN208729829 U CN 208729829U CN 201821364554 U CN201821364554 U CN 201821364554U CN 208729829 U CN208729829 U CN 208729829U
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- component
- mechanical arm
- groove
- rotary shaft
- rotary joint
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Abstract
The utility model provides a kind of mechanical rotary joint, including axial bearing, thrust bearing and butterfly spring, rotary shaft, the mechanical arm first component and mechanical arm second component, the rotary shaft is arranged in the mechanical arm first component respectively, the axial bearing, the thrust bearing, the butterfly spring and the mechanical arm second component, axial bearing one end with the rotary shaft respectively, one end of the mechanical arm first component is interference fitted connection, the thrust bearing, the butterfly spring is respectively arranged between the mechanical arm first component and the mechanical arm second component.The utility model beneficial effect is: using axial bearing, thrust bearing and butterfly spring and interference fit connection type, being radially wobbled and axial runout gap with eliminating joint.It realizes and largely improves the rigidity of joint of mechanical arm and the effect of positioning accuracy.Aim to solve the problem that the problem of existing machinery rotary joint can not largely improve the rigidity and positioning accuracy in joint.
Description
Technical field
The utility model relates to joint of mechanical arm technical field, in particular to a kind of mechanical rotary joint.
Background technique
With the fast development of industrial technology, machine operation is widely used in production and living.And it is raw in industry
In production, demand of the automatic production line to high rigidity and high position precision the grade high performance of mechanical arm is higher and higher.And mechanical arm
Joint is the important component for influencing mechanical arm whole body rigidity and positioning accuracy.And influence the rigidity and positioning in the joint of mechanical arm
The factor of error be mainly derived from joint radially wobble and axial runout.Joint radially wobbles the bar that joint can be made to connect
The deflection that angle is generated between part, leads to the reduction of equipment overall stiffness.And since the bounce between the Internal and external cycle of bearing can draw
The change of the distance between rod piece of joint connection is played, although this bounce distance is smaller, for the machine of high-precision requirement
For be still great position error.
In the prior art, the position error problem in joint is handled using duplex bearing, although can have using duplex bearing
Effect ground reduces the axial runout radially wobbled with joint between the rod piece of joint connection, but still can not largely improve
The rigidity and positioning accuracy in joint.
Utility model content
The main purpose of the utility model are as follows: aim to solve the problem that existing machinery rotary joint can not largely improve joint
Rigidity and positioning accuracy the problem of.
To achieve the above object, the utility model provides a kind of mechanical rotary joint, including axial bearing, thrust bearing,
Butterfly spring, rotary shaft, the mechanical arm first component and mechanical arm second component, the rotary shaft are arranged in the mechanical arm respectively
The first component, the axial bearing, the thrust bearing, the butterfly spring and the mechanical arm second component, the axial direction
Bearing is interference fitted with one end of one end of the rotary shaft, the mechanical arm first component connects respectively, the thrust bearing,
The butterfly spring is respectively arranged between the mechanical arm first component and the mechanical arm second component.
Preferably, the rotation center of the mechanical arm first component is through-hole, in the axial direction of the rotary shaft, the machinery
One end of the arm first component is equipped with the first groove, and the other end of the mechanical arm first component is equipped with the second groove, the axial direction
Bearing is set in first groove, and the thrust bearing division is divided into second groove.
Preferably, the rotation center of the mechanical arm second component is through-hole, in the axial direction of the rotary shaft, the machinery
One end of arm second component is equipped with third groove, and the thrust bearing division is divided into the third groove, the butterfly spring
It is fitted closely with the thrust bearing.
Preferably, the butterfly spring is set in the third groove.
Preferably, the axial bearing includes inner ring, the first ball retainer and outer ring, and the inner ring passes through described first
Ball retainer is connect with the outer ring, and the inner ring, first ball retainer and the outer ring are sheathed on described respectively
On the outside of rotary shaft, the inner ring is fitted closely with the rotary shaft, and the outer ring is fitted closely with the mechanical arm first component.
Preferably, one end of the rotary shaft is equipped with the shaft shoulder, and the base end wall and side wall of the outer ring are respectively with described first
Groove fits closely, and the top end wall of the inner ring is fitted closely with the shaft shoulder, the base end wall of the inner ring and described first recessed
Trench bottom fits closely.
Preferably, the thrust bearing includes foundation ring, blowout patche and the second ball retainer, and the foundation ring passes through described second
Ball retainer is connect with the blowout patche, and the foundation ring, the blowout patche and second ball retainer are sheathed on described respectively
On the outside of rotary shaft, the foundation ring is set in second groove, and the blowout patche part is closely pasted with the mechanical arm second component
It closes.
Preferably, the lateral wall of the foundation ring is fitted closely with second groove, the top end wall of the blowout patche with it is described
The top end wall of one end of butterfly spring fits closely.
Preferably, the mechanical rotary joint includes locking nut, and the other end of the rotary shaft is equipped with screw thread, the lock
Tight nut is fixedly connected by the screw thread with the other end of the rotary shaft.
Preferably, the other end of the mechanical arm second component is equipped with the 4th groove, and the machinery rotary joint includes pad
Circle, one end of the washer fits closely with the 4th bottom portion of groove, the top end wall of one end of the locking nut with it is described
The other end of washer fits closely.
A kind of mechanical rotary joint provided by the utility model, using axial bearing respectively with rotary shaft, mechanical arm first
The connection of component interference fit, thrust bearing and mechanical arm first component interference fit connect, with thrust bearing and butterfly spring group
Conjunction mode connects the mechanical arm first component and mechanical arm second component, is radially wobbled and axial runout gap with eliminating joint.
It realizes and largely improves the rigidity of joint of mechanical arm and the effect of positioning accuracy.Aim to solve the problem that existing machinery rotary joint without
Method largely improves the problem of rigidity and positioning accuracy in joint.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the utility model one embodiment of mechanical rotary joint；
Fig. 2 is a kind of structural section schematic diagram of the utility model one embodiment of mechanical rotary joint.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and cannot be construed to the utility model
Limitation.
In order to simplify the disclosure of the utility model, hereinafter the component of specific examples and setting are described.Certainly, it
Be only example, and purpose does not lie in limitation the utility model.In the description of the present invention, it should be noted that
Unless otherwise specified and limited, term " installation ", " being located at ", " connection " shall be understood in a broad sense, for example, it may be mechanical connection or
Electrical connection, the connection being also possible to inside two elements can be directly connected, can also indirectly connected through an intermediary,
For the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
A kind of mechanical rotary joint according to the preferred embodiment in the utility model, machinery rotation are described with reference to the accompanying drawings
Realize the connection of rotary joint zero clearance in joint.In the present embodiment, mechanical rotary joint is the rotary joint of robot, axial bearing
For deep groove ball bearing, thrust bearing is thrust ball bearing.
In conjunction with Fig. 1 to Fig. 2, a kind of mechanical rotary joint 1 provided in the present embodiment, including axial bearing 2, thrust bearing
3, butterfly spring 4, rotary shaft 5, the mechanical arm first component 6 and mechanical arm second component 7, rotary shaft 5 are arranged in mechanical arm respectively
The first component 6, axial bearing 2, thrust bearing 3, butterfly spring 4 and mechanical arm second component 7, axial bearing 2 respectively with rotation
One end of axis 5, one end of the mechanical arm first component 6 are interference fitted connection, and thrust bearing 3, butterfly spring 4 are respectively arranged on mechanical arm
Between the first component 6 and mechanical arm second component 7.
Rotary shaft 5 is set to the mechanical arm first component 6, axial bearing 2, thrust bearing 3, butterfly spring 4 and mechanical arm second
At the rotation center of component 7.The connection that axial bearing 2 and the mechanical arm first component 6 are fastened by interference fit type, axis
The connection fastened to bearing 2 by interference fit type and rotary shaft 5, the other end of the mechanical arm first component 6 is by pushing away
Power bearing 3 and butterfly spring 4 are closely connect with one end of mechanical arm second component 7.The mechanical use of rotary joint 1 axial bearing 2,
Thrust bearing 3 and butterfly spring 4 are radially wobbled and axial runout gap with eliminating joint.It realizes and largely improves machine
The rigidity of tool shoulder joint and the effect of positioning accuracy.Joint can not largely be improved by solving existing machinery rotary joint
The problem of rigidity and positioning accuracy.
The rotation center of the mechanical arm first component 6 is through-hole, in the axial direction of rotary shaft 5, one end of the mechanical arm first component 6
Equipped with the first groove 8, the other end of the mechanical arm first component 6 is equipped with the second groove 9, and axial bearing 2 is set in the first groove 8,
3 part of thrust bearing is set in the second groove 9.The mechanical arm first component 6 is the mechanical connection of rotary joint 1 as mechanical arm
One part, cylindrical, rotation center is through-hole, i.e., in hollow, the axial direction of rotary shaft 5 and the rotation of the mechanical arm first component 6
Turn center coincidence.The rotation center of the mechanical arm first component 6 places rotary shaft 5.One end of the mechanical arm first component 6 and the other end
It invaginates respectively, the both ends of the mechanical arm first component 6 are respectively equipped with the first groove 8, the second groove 9, are respectively used to place axial axis
Hold 2 and part thrust bearing 3.First groove 8 of the mechanical arm first component 6, ensure that axial bearing 2 and the mechanical arm first component
The compactness and stability of 6 connections.Second groove 9 of the mechanical arm first component 6 ensure that part thrust bearing 3 and mechanical arm the
The compactness and stability of one component 6 connection.
The rotation center of mechanical arm second component 7 is through-hole, in the axial direction of rotary shaft 5, one end of mechanical arm second component 7
Equipped with third groove 10,3 part of thrust bearing is set in third groove 10, and butterfly spring 4 is fitted closely with thrust bearing 3.Machine
Tool arm second component 7 is another part as mechanical arm that mechanical rotary joint 1 connects, be it is cylindric, rotation center is
Through-hole, i.e., in hollow, the axial direction of rotary shaft 5 is overlapped with the rotation center of mechanical arm second component 7.Mechanical arm second component 7
Rotation center places rotary shaft 5.One end of mechanical arm second component 7 is invaginated, and it is recessed that one end of mechanical arm second component 7 is equipped with third
Slot 10 is used for placement part thrust bearing 3.Butterfly spring 4 is equipped between thrust bearing 3 and third groove 10.Mechanical arm second
Placement part thrust bearing 3 and butterfly spring 4, thrust bearing 3 are fitted closely with butterfly spring 4 in the third groove 10 of component 7,
It ensure that the compactness and stability that thrust bearing 3 is connect with butterfly spring 4, also ensure butterfly spring 4 and mechanical arm second
The compactness and stability that component 7 connects.
Butterfly spring 4 is set in third groove 10.The other end of butterfly spring 4 is placed in the of mechanical arm second component 7
In three grooves 10, the bottom of the third groove 10 of the other end and mechanical arm second component 7 of butterfly spring 4 is fitted closely.It is mechanical
The arm first component 6 is connected by butterfly spring 4 with thrust bearing 3 with mechanical arm second component 7.Using butterfly spring 4 with push away
The combination connection of power bearing 3, the connection mechanical arm first component 6 and mechanical arm second component 7, thrust bearing 3 of releiving, mechanical arm first
Between the rod piece that pressure, load and elimination suffered by component 6 and mechanical arm second component 7 and mechanical rotary joint 1 connect away from
From change.
Axial bearing 2 includes inner ring 12, the first ball retainer 13 and outer ring 14, and inner ring 12 passes through the first ball retainer
13 connect with outer ring 14, and inner ring 12, the first ball retainer 13 and outer ring 14 are sheathed on the outside of rotary shaft 5 respectively, inner ring 12 with
Rotary shaft 5 fits closely, and outer ring 14 is fitted closely with the mechanical arm first component 6.Between rotary shaft 5 and the mechanical arm first component 6
Equipped with axial bearing 2, fit closely inner ring 12 and rotary shaft 5 using interference fit connection type, outer ring 14 and mechanical arm the
One component 6 fits closely.In the present embodiment, axial bearing 2 is deep groove ball bearing.Deep groove ball bearing substantial radial load,
Radial load and axial load can also be born simultaneously.When it is subjected only to radial load, contact angle zero.Using deep-groove ball axis
It holds, to prevent or reduce generated angle between the rod piece connected when mechanical rotary joint 1 radially wobbles machinery rotary joint 1
Degree deflection improves the overall stiffness of mechanical rotary joint 1.
One end of rotary shaft 5 is equipped with the shaft shoulder 15, and the base end wall and side wall of outer ring 14 are fitted closely with the first groove 8 respectively,
The top end wall of inner ring 12 is fitted closely with the shaft shoulder 15, and the base end wall of inner ring 12 is fitted closely with 8 bottom of the first groove.Axial bearing
2 are placed in the first groove 8 of the mechanical arm first component 6, are fastened axial bearing 2 and rotary shaft 5 using interference fit type
Connection.The base end wall and side wall of the outer ring 14 of axial bearing 2 contact closely with the first groove 8 of the mechanical arm first component 6 respectively
Connection.The top end wall of inner ring 12 and the shaft shoulder 15 of rotary shaft 5 are fastenedly connected, and axial bearing 2 is tightly fixed to rotary shaft 5 and machine
Between the tool arm first component 6.Axial bearing 2 and rotary shaft 5, the connection type of the mechanical arm first component 6 eliminate axial bearing 2
Axial bounce gap, forms the relative rotation between the mechanical arm first component 6 and rotary shaft 5.
Thrust bearing 3 includes foundation ring 16, blowout patche 17 and the second ball retainer 18, and foundation ring 16 passes through the second ball retainer
18 connect with blowout patche 17, and foundation ring 16, blowout patche 17 and the second ball retainer 18 are sheathed on 5 outside of rotary shaft respectively, and foundation ring 16 is set
In in the second groove 9,17 part of blowout patche is fitted closely with mechanical arm second component 7.Thrust bearing 3 is set to the second groove 9 and the
Between three grooves 10, foundation ring 16 is fitted closely with 9 bottom of the second groove.17 part of blowout patche is set in third groove 10.Thrust axis
The axial thrust of rotor in operation can be born by holding 3.Thrust bearing 3 uses thrust ball bearing, and thrust ball bearing can bear axial direction
Load, the thrust bearing 3 are made of foundation ring 16, blowout patche 17 and the second ball retainer 18, and the second ball retainer 18 is set to bottom
Between circle 16 and blowout patche 17, it is separately connected with foundation ring 16 and blowout patche 17.Use thrust bearing 3 to bear axial load, to eliminate
The change of the distance between the rod piece connecting with mechanical rotary joint 1 improves the positioning accuracy of mechanical rotary joint 1.
The lateral wall of foundation ring 16 is fitted closely with the second groove 9, the top of one end of the top end wall and butterfly spring 4 of blowout patche 17
End wall fits closely.Thrust bearing 3, butterfly spring 4 are set between the mechanical arm first component 6 and mechanical arm second component 7, thrust
The lateral wall of the foundation ring 16 of bearing 3 is fitted closely with the second groove 9 of the mechanical arm first component 6 and is connect.Butterfly spring 4 is in circular cone
Shape plate-like, butterfly spring 4 have the characteristics of rigidity is big, buffering vibration absorption ability is strong, can bear big load with small deformation.Slow down machinery
Pressure and vibration suffered by the arm first component 6 and mechanical arm second component 7, improve the whole rigidity of mechanical rotary joint 1 and
Positioning accuracy.
Mechanical rotary joint 1 includes locking nut 19, and the other end of rotary shaft 5 is equipped with screw thread, and locking nut 19 passes through spiral shell
Line is fixedly connected with the other end of rotary shaft 5.The other end of rotary shaft 5 is equipped with screw thread, for connecting locking nut 19, rotary shaft
5 other end, which generates thrust by connection locking nut 19, makes the mechanical arm first component 6, butterfly spring 4, thrust bearing 3 and machine
It is closely connected between tool arm second component 7, makes to keep Pre strained state between the mechanical arm first component 6 and mechanical arm second component 7
While can be mutually rotatable again.
The other end of mechanical arm second component 7 is equipped with the 4th groove 11, and mechanical rotary joint 1 includes washer 20, washer 20
One end fitted closely with 11 bottom of the 4th groove, the top end wall of one end of locking nut 19 is closely pasted with the other end of washer 20
It closes.Washer 20 is set between 7 other end of locking nut 19 and mechanical arm second component, is placed in the of mechanical arm second component 7
In base end wall in four grooves 11.Washer 20 is used to protecting the surface of mechanical arm second component 7 not by the scratch of locking nut 19,
Disperse locking nut 19 to the pressure of mechanical arm second component 7.
A kind of mechanical rotary joint provided by the embodiment of the utility model, using axial bearing respectively with rotary shaft, machinery
The connection of arm first component interference fit, thrust bearing and mechanical arm first component interference fit connect, with thrust bearing and butterfly
Spring assembly mode connects the mechanical arm first component and mechanical arm second component, is radially wobbled and axial runout with eliminating joint
Gap.It realizes and largely improves the rigidity of joint of mechanical arm and the effect of positioning accuracy.Aim to solve the problem that existing mobile power source
Rotary joint machinery rotary joint can not largely improve the problem of rigidity and positioning accuracy in joint.The utility model is real
A kind of mechanical rotary joint for applying example offer is eliminated in such a way that deep groove ball bearing, thrust ball bearing are combined with butterfly spring
Mechanical rotary joint radially wobble and axial runout, increase the rigidity of mechanical rotary joint significantly, make using between zero
The positioning accuracy of the robot of gap rotary joint obtains raising largely.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
Equivalent structure or equivalent flow shift made by using the description of the utility model and the drawings, is directly or indirectly transported
Used in other related technical areas, it is also included in the patent protection scope of the utility model.
Claims (10)
1. a kind of machinery rotary joint, which is characterized in that including axial bearing, thrust bearing, butterfly spring, rotary shaft, machinery
The arm first component and mechanical arm second component, the rotary shaft are arranged in the mechanical arm first component, the axial axis respectively
Hold, the thrust bearing, the butterfly spring and the mechanical arm second component, the axial bearing respectively with the rotary shaft
One end, the mechanical arm first component one end be interference fitted connection, the thrust bearing, the butterfly spring are respectively arranged on
Between the mechanical arm first component and the mechanical arm second component.
2. machinery rotary joint according to claim 1, which is characterized in that the rotation center of the mechanical arm first component
For through-hole, the first groove, the mechanical arm first are equipped in one end of the axial direction of the rotary shaft, the mechanical arm first component
The other end of component is equipped with the second groove, and the axial bearing is set in first groove, and the thrust bearing division is divided into
In second groove.
3. machinery rotary joint according to claim 1, which is characterized in that the rotation center of the mechanical arm second component
For through-hole, third groove, the thrust bearing division are equipped in one end of the axial direction of the rotary shaft, the mechanical arm second component
It is divided into the third groove, the butterfly spring is fitted closely with the thrust bearing.
4. machinery rotary joint according to claim 3, which is characterized in that the butterfly spring is set to the third groove
It is interior.
5. machinery rotary joint according to claim 2, which is characterized in that the axial bearing includes inner ring, the first steel
Ball retainer and outer ring, the inner ring are connect by first ball retainer with the outer ring, the inner ring, described first
Ball retainer and the outer ring are sheathed on respectively on the outside of the rotary shaft, and the inner ring is fitted closely with the rotary shaft, institute
Outer ring is stated to fit closely with the mechanical arm first component.
6. machinery rotary joint according to claim 5, which is characterized in that one end of the rotary shaft is equipped with the shaft shoulder, institute
The base end wall and side wall for stating outer ring are fitted closely with first groove respectively, and the top end wall of the inner ring and the shaft shoulder are close
Fitting, the base end wall of the inner ring are fitted closely with first bottom portion of groove.
7. it is according to claim 2 machinery rotary joint, which is characterized in that the thrust bearing include foundation ring, blowout patche and
Second ball retainer, the foundation ring are connect by second ball retainer with the blowout patche, the foundation ring, the blowout patche
It is sheathed on the outside of the rotary shaft respectively with second ball retainer, the foundation ring is set in second groove, described
Blowout patche part is fitted closely with the mechanical arm second component.
8. machinery rotary joint according to claim 7, which is characterized in that the lateral wall of the foundation ring and described second recessed
Slot fits closely, and the top end wall of the blowout patche and the top end wall of one end of the butterfly spring fit closely.
9. machinery rotary joint according to claim 1, which is characterized in that the machinery rotary joint includes locking screw
Mother, the other end of the rotary shaft are equipped with screw thread, and the locking nut is solid by the screw thread and the other end of the rotary shaft
Fixed connection.
10. machinery rotary joint according to claim 9, which is characterized in that the other end of the mechanical arm second component
Equipped with the 4th groove, the machinery rotary joint includes washer, and one end of the washer is closely pasted with the 4th bottom portion of groove
It closes, the top end wall of one end of the locking nut and the other end of the washer fit closely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821364554.XU CN208729829U (en) | 2018-08-22 | 2018-08-22 | A kind of machinery rotary joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821364554.XU CN208729829U (en) | 2018-08-22 | 2018-08-22 | A kind of machinery rotary joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208729829U true CN208729829U (en) | 2019-04-12 |
Family
ID=66030880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821364554.XU Active CN208729829U (en) | 2018-08-22 | 2018-08-22 | A kind of machinery rotary joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208729829U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111716378A (en) * | 2020-05-19 | 2020-09-29 | 昆明理工大学 | Double-sided film tearing equipment |
| CN111904649A (en) * | 2020-07-30 | 2020-11-10 | 深圳市瑞沃德生命科技有限公司 | Rotary positioning device and brain stereotaxic instrument |
-
2018
- 2018-08-22 CN CN201821364554.XU patent/CN208729829U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111716378A (en) * | 2020-05-19 | 2020-09-29 | 昆明理工大学 | Double-sided film tearing equipment |
| CN111716378B (en) * | 2020-05-19 | 2021-12-03 | 昆明理工大学 | Double-sided film tearing equipment |
| CN111904649A (en) * | 2020-07-30 | 2020-11-10 | 深圳市瑞沃德生命科技有限公司 | Rotary positioning device and brain stereotaxic instrument |
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